Knife blade guard



FIG. 1 is a top left side perspective view of my new knife blade guard as viewed on a knife;

FIG. 2 is a left side elevation, the right side being a mirror image;

FIG. 3 is a rear elevation;

FIG. 4 is a front elevation;

FIG. 5 is a top plan view; and,

FIG. 6 is a bottom plan view.

The broken lines represent the environment in which the knife blade guard is used and form no part of the claim. 

The ornamental design for a knife blade guard, as shown and described. 